1 /* 2 * Emulation of BSD signals 3 * 4 * Copyright (c) 2003 - 2008 Fabrice Bellard 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "qemu/osdep.h" 21 #include "qemu.h" 22 #include "signal-common.h" 23 #include "hw/core/tcg-cpu-ops.h" 24 25 /* 26 * Stubbed out routines until we merge signal support from bsd-user 27 * fork. 28 */ 29 30 /* 31 * Queue a signal so that it will be send to the virtual CPU as soon as 32 * possible. 33 */ 34 void queue_signal(CPUArchState *env, int sig, target_siginfo_t *info) 35 { 36 qemu_log_mask(LOG_UNIMP, "No signal queueing, dropping signal %d\n", sig); 37 } 38 39 /* 40 * Force a synchronously taken QEMU_SI_FAULT signal. For QEMU the 41 * 'force' part is handled in process_pending_signals(). 42 */ 43 void force_sig_fault(int sig, int code, abi_ulong addr) 44 { 45 CPUState *cpu = thread_cpu; 46 CPUArchState *env = cpu->env_ptr; 47 target_siginfo_t info = {}; 48 49 info.si_signo = sig; 50 info.si_errno = 0; 51 info.si_code = code; 52 info.si_addr = addr; 53 queue_signal(env, sig, &info); 54 } 55 56 void signal_init(void) 57 { 58 } 59 60 void process_pending_signals(CPUArchState *cpu_env) 61 { 62 } 63 64 void cpu_loop_exit_sigsegv(CPUState *cpu, target_ulong addr, 65 MMUAccessType access_type, bool maperr, uintptr_t ra) 66 { 67 const struct TCGCPUOps *tcg_ops = CPU_GET_CLASS(cpu)->tcg_ops; 68 69 if (tcg_ops->record_sigsegv) { 70 tcg_ops->record_sigsegv(cpu, addr, access_type, maperr, ra); 71 } 72 73 force_sig_fault(TARGET_SIGSEGV, 74 maperr ? TARGET_SEGV_MAPERR : TARGET_SEGV_ACCERR, 75 addr); 76 cpu->exception_index = EXCP_INTERRUPT; 77 cpu_loop_exit_restore(cpu, ra); 78 } 79 80 void cpu_loop_exit_sigbus(CPUState *cpu, target_ulong addr, 81 MMUAccessType access_type, uintptr_t ra) 82 { 83 const struct TCGCPUOps *tcg_ops = CPU_GET_CLASS(cpu)->tcg_ops; 84 85 if (tcg_ops->record_sigbus) { 86 tcg_ops->record_sigbus(cpu, addr, access_type, ra); 87 } 88 89 force_sig_fault(TARGET_SIGBUS, TARGET_BUS_ADRALN, addr); 90 cpu->exception_index = EXCP_INTERRUPT; 91 cpu_loop_exit_restore(cpu, ra); 92 } 93